Quote Originally Posted by pat mccarthy View Post
well your not using a ford box ? msd box ? all the msd s i used and that s many some were i was told to use 035 to 045 this is more to keep the plugs from blowing out with hi cr .opening up the plug gap your trying to do what? better burn. building more coil out put . spark dwell time ? and use a finite tip plug$$ that will do zip for you ?? with the msd you have this is multiple spark. no need to open up the gap but i could be way wrong but it works for me
Pat - just for the heluvit, did a google using these terms, "Effect of spark plug gaps". My suggestion on that, unless you really need to be confused, don't. Use what works for you. But after reading through it - your figures are good, but mostly for high compression and/or blown - turbo engines. What I did find is that no one really has a clue!!! Even the plug companies don't agree. Most did agree that big gaps will 'test the secondary' wiring. What I'm gong to do is reduce the gap to say .045/.048 and give that a try. I'll also keep the fairly low mileage take out plugs for more experimentation - if for no other reason then to play around to see if going one way or another makes any difference. Thanks for 'pushing' me to think